Grok Latest is $1.4 cheaper per 1M input tokens (46.7% lower; 1.88x difference).
API cost decision in 10 seconds
NewEmber-1 vs Grok Latest
Pick Grok Latest for lower cost; pick Ember-1 only if the larger context window matters more.
Page updated:
Data confirmed:
Prices normalized to USD per 1M tokens
Sample workload: 1M input + 500K output
Budget verdict
Pick Grok Latest for lower cost; pick Ember-1 only if the larger context window matters more.
On the standard 1M input plus 500K output workload, Grok Latest is estimated at $4 vs $10.5 for Ember-1, saving $6.5 (61.9% lower).
Cost-first pickGrok Latest
Context-first pickEmber-1
Sample savings$6.561.9%
10x traffic gap$65
Ember-1 has more context, but Grok Latest saves $6.5 on the standard workload. At 10x that traffic, the same price gap is about $65. Use the calculator below to replace the sample workload with your own token volume.
Cost sensitivity
Workload Sensitivity
Grok Latest stays cheaper across input-heavy, balanced, and output-heavy sample workloads.
| Workload shape | Token mix | Better pick | Ember-1 | Grok Latest |
|---|---|---|---|---|
| Input-heavy / RAG | 5M input + 500K output | Grok Latest | $22.5 | $10.4 |
| Balanced workload | 1M input + 1M output | Grok Latest | $18 | $6.4 |
| Output-heavy chatbot | 1M input + 5M output | Grok Latest | $78 | $25.6 |
Grok Latest is $10.2 cheaper per 1M output tokens (68% lower; 3.12x difference).
Ember-1 has 548.58K more context (2.1x larger).
Grok Latest is $6.5 cheaper on the standard workload (61.9% lower).
Estimate your workload cost
Your Workload Cost
This estimate uses normalized public API pricing per 1M tokens. It is a planning aid, not a billing quote. Verify provider pricing, limits, and terms before production use.
Quick Decision
Grok Latest has the lower input price; Grok Latest has the lower output price; Ember-1 offers the larger context window. For the 1M input plus 500K output sample, Grok Latest is cheaper for the standard workload.
For a 1M input token plus 500K output token workload, the estimated API cost is $10.5 for Ember-1 and $4 for Grok Latest.
Choose Ember-1 when you care most about larger context window.
Choose Grok Latest when you care most about lower input-token price, and lower output-token price.
- On the standard 1M input plus 500K output workload, Grok Latest is estimated at $4 vs $10.5 for Ember-1, saving $6.5 (61.9% lower).
- Grok Latest is $6.5 cheaper on the standard workload (61.9% lower).
- Grok Latest is $1.4 cheaper per 1M input tokens (46.7% lower; 1.88x difference).
- Grok Latest is $10.2 cheaper per 1M output tokens (68% lower; 3.12x difference).
- Ember-1 has 548.58K more context (2.1x larger).
| Feature | NewEmber-1 (Fireworks) | Grok Latest (xAI) |
|---|---|---|
| Input Price prompt tokens per 1M | $3 | $1.6 |
| Completion Price per 1M tokens | $15 | $4.8 |
| Sample Workload Cost 1M input + 500K output | $10.5 | $4 |
| Context Window | 1.05M | 500K |
| Release Date |
Use-Case Decision Matrix
| Use case | Better pick | Why |
|---|---|---|
| Budget-constrained production | Grok Latest | On the standard 1M input plus 500K output workload, Grok Latest is estimated at $4 vs $10.5 for Ember-1, saving $6.5 (61.9% lower). |
| High-volume input processing | Grok Latest | Lower prompt-token price matters most when prompts, retrieved passages, or documents dominate the bill. |
| Long responses and chatbots | Grok Latest | Lower output-token price matters most when assistants generate many completion tokens. |
| RAG or long-document work | Ember-1 | A larger context window leaves more room for retrieved passages, conversation history, or source files. |
Related Alternatives
- No lower-cost same-provider swap is currently tracked for this pair.
- Grok 4.20 Multi-Agent offers 2M context with $2.5 sample workload cost.
- Grok 4.20 offers 2M context with $2.5 sample workload cost.
- GLM 5.3 Flash offers 1.31M context with $0.4 sample workload cost.
- DeepSeek V4 Flash 0731 offers 1.31M context with $0.19 sample workload cost.
- MiMo-V2.6-Pro · Xiaomi · #1
- GLM 5.3 Flash · Z.ai · #2
- DeepSeek V4.1 Flash · DeepSeek · #3
- Hy4 preview · Tencent · #4
Cheaper alternatives
Review low-cost models sorted by a standard 1M input plus 500K output workload.
Open cheapest modelsLarger context alternatives
Find models with larger context windows for RAG, long documents, and codebase review.
Open largest context modelsProvider catalogs
Compare models within provider hubs before choosing a final API vendor.
Open provider hubsFireworks catalog
Review all tracked Fireworks models before deciding whether this matchup is the right shortlist.
Open Fireworks modelsxAI catalog
Check other xAI models with comparable pricing, context, or release timing.
Open xAI modelsEmber-1 is a specialized reasoning model from Fireworks Research, built on [Kimi K3](https://openrouter.ai/moonshotai/kimi-k3). It is designed to make every token go further: it produces shorter reasoning traces, using roughly 40%...
This model always redirects to the latest Grok model from xAI.